feat: Add install target to Makefile

Makefile

@@ -3,6 +3,10 @@ TEMPDIR := $(shell mktemp -t tmp.XXXXXX -d)
 FLAKE8 := $(shell which flake8)
 PYLINT := $(shell which pylint3 || which pylint)
 
+ifeq ($(PREFIX),)
+    PREFIX := /usr/local
+endif
+
 determineversion:
 	$(eval GITDESCRIBE_DEBIAN := $(shell git describe --tags --dirty | cut -c 2-))
 	sed 's/Version: .*/Version: $(GITDESCRIBE_DEBIAN)/' debian/DEBIAN/control_template > debian/DEBIAN/control
@@ -28,6 +32,13 @@ builddeb_real:
 buildarch: determineversion
 	makepkg --skipinteg
 
+install:
+	install -d $(DESTDIR)$(PREFIX)/bin
+	install -d $(DESTDIR)$(PREFIX)/share/doc/normfn
+	install -m 755 normfn $(DESTDIR)$(PREFIX)/bin
+	install -m 644 README* $(DESTDIR)$(PREFIX)/share/doc/normfn
+	install -m 644 LICENSE* $(DESTDIR)$(PREFIX)/share/doc/normfn
+
 install_osx_finder:
 	cp normfn osx/services/normfn-finder.workflow/Contents/
 	rm -Rfv ~/Library/Services/normfn-finder.workflow/

README.md

@@ -37,8 +37,13 @@ using any standard `.deb` installation approach, e.g. `dpkg -i normfn*.deb`.
 
 ### Other Platforms
 
-Work is being done to make this simpler, but for now, please clone this
-repository and move the `normfn` script to anywhere in your `$PATH`.
+* Clone this repository locally and change to the directory where you cloned it.
+
+* If you have write-access to the system-wide `/usr/local/bin` directory, just
+  run `make install`.
+
+* If you don't, install it in your user directory with `PREFIX=~/.local/bin make
+  install` (this directory needs to be in your `$PATH`).
 
 ## Usage